Ribbed dowel



FIG. 1 is a perspective view of the ribbed dowel of the subject invention.

FIG. 2 is a front view of the ribbed dowel of FIG. 1, the opposite, left, and right side view being substantially identical thereto.

FIG. 3 is a top view of the ribbed dowel of FIG. 1; and,

FIG. 4 is a bottom view of the ribbed dowel of FIG. 1. 

The ornamental design for a ribbed dowel, as shown and described. 